Harrow with yielding bars



- Oct. 14, 1947. T. A'. BARRENTINE v 2,429,013

' y HARROW WITHA YIELDING BARS Fild Dec. 1, 1944y 2 sheets-sheet 1 37INVENToR.

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Oct. 14, 1947i A A. rBARRENTIYNE l 2,429,013

' HARRow WITH YI'E'LDING BARS Filed D90. 1, 1944 2 Sh9etS-Sheet 2INVENToIg. HamsdQ/"fe/zizlze ATTO R N EYB Patented Oct. 14, Y 1947ZAZtiS UNITED STATES PATENT OFFICE 2,429,013 yI mnnow WITH YIELDING BARSThomas A.` Barrentine, Greenwood, Miss. Application December 1, 1944,Serial No. 566,073

3 Claims. (Cl. 55--129) The invention relates to a drag harrow, and moreessentially to a tractor section harrow.

The primary object of theinvention is the provision of a harrow of thischaracter, wherein the teeth thereof are balanced against spring-typeshock absorbers, these absorbing all shocks and jars in rough and'stumpysoil, and such teeth can be adjusted to any position desired, thevharrow being especially adaptedfor use with a tractor.

Another object of the invention is the provision of a harrow of thischaracter, wherein it is of a sectional set-up, and these sections areflexibly linked to one another, thereby giving selected rise and fallthereto, when the harrow is being pulled, to maintain perfect harrowingoperation in its use.

Still another object is to provide means for sliding the harrow over theground for transporting the same, and in addition means are provided forreinforcing the frame side members.

A further object of the invention is the provision of a narrow of thischaracter, wherein the shock absorbing action thereof is unique andnovel, the harrow being susceptible of ready and easy adjustment byhand, and is relieved from tooth breakage.

A still further object of the invention is the provision of a harrow ofthis character, which is simple in construction, thoroughly reliable andefcient in operation, strong, durable, susceptible of heavy duty,conveniently adjusted, capable of wide and narrow range harrowingaction, and inexpensive to manufacture.

With these and other objects in view, the invention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described, illustrated in the accompanyingdrawings, which show the preferred embodiment of the invention, and

pointed out in the claims hereunto appended.

In the accompanying drawings- Figure l is a top plan View of a harrowconstructed in accordance with the invention.

Figure 2 is a side elevation thereof.

Figure 3 is a fragmentary enlarged vertical sectional view through theharrow. v

Figure 4 is a fragmentary sectional view taken on the line 4--4 ofFigure l looking in the direction of the arrows.

Figure 5 is a Sectional View on the line 5-5 of Figure 4 looking in thedirection of the arrows.

Figure 6 is a fragmentary top plan view of the structure shown inFigures 4 and 5.

Figure 7 is a fragmentary perspective view of the shock absorbingarrangement of the harrow.

Figure 8 is a detailed section showing the teeth moved to a position atagainst the ground and with the slide in position to contact the groundfor transportation.

Similar reference characters indicate correspending parts throughout theseveral views in the drawing.

Referring to the drawings in detail, A designates generally one sectionof a harrow constructed in accordance with the invention, and adescription of this section will suffice for that of other sections,which are in their set-up.

The section A comprises a frame I0 having opposed irregularly angledside bars Il through which extend the pins or stub shafts l5 secured toand carrying channel shaped bars I6 on which the harrow teeth aremounted as shown in Figures 3, 4, 5 and 6. The trunnion ends of membersl5 extend through openings in side bars Il and are Cotter-pinned as atI7 to be rotatably held in place. It will thus be seen that the frameside bars are sturdy and adequately reinforced; that the teeth areproperly carried on channel bars I6 which are of strong construction,and that such bars are rotatably mounted by trunnions l5.

On the channel members I6 are the harrow teeth I8, which are welded orotherwise secured thereto in upright spaced relation to one another.Each bar I6 has fixed thereto an upwardly directed turning arm I9,having pivoted at 20 thereto upper and lower toggle linkage 2| and 22,respectively, which aft of the frame have pivotal connection at 23 witha throw lever 24, the latter being intermediate with relation to a pairof the arms I9. The upper linkage 2| has fitted thereto a toothed keeperrack 25, in which is selectively engaged the latching cross key or pin28 of a latching yoke 27, the latter being provided with a springtensioned retentioning device 28 for holding the key or pin 26 in itsengaged position in the rack 25, as best seen in Figure 3 of thedrawings.

Spring floated in the yoke 21 at its outer closed end is a couplingsaddle 29, which is pivoted at 30 to the throw lever 24 at an elevatedpoint thereof, so that the yoke slopes in the direction of the rack 25in a forward manner. The saddle 29 through the shanks or stems 3|thereon is slidably fitted to the closed end of the yoke, and theseshanks or stems carry tensioning springs 32, which function as shockabsorbers, to relieve shocks and jars to the harrow teeth I8 whenworking in rough and stumpy soil.

When two or more of the frames are used for harrowing, the said framesare flexibly linked together through openings 35 in the front ends ofbars Il so that they are connected for selective rise and fallindividually thereto.

Attached by welding or the like to the side sills I I are reinforcingbars 33 which have been found desirable to hold sills II in shape afterthey have been formed.

In transporting the harrow, the throw lever 24 is moved forward to itsfarthest point which moves the channel member I6 to position the teethI8 horizontally and parallel with the ground in which position theU-shaped slide 34 is moved to the position shown in Figure 3 engagingthe ground to slide the harrow'thereover. It is not necessary to turnthe harrow over for transportation from one place to another.

What is claimed is:

1. A harrow of the kind described comprising a frame having irregularlyangled side bars formed with top reinforcing members, a plurality ofchanneled rocking bars having trunnions thereon inset in said frame,turning arms carried by the bars, harrow teeth on the bars, upper andlower toggle linkage pivotally connecting the arms, a throw lever foractuating the linkage, a latching yoke, a coupling saddle positioned inthe closed end of said yoke, said saddle being pivoted to said lever,stems on said saddle for slidably 4 connecting said yoke to said saddle,a. toothed keeper on said upper toggle link, coacting with said yoke,and tensioning springs on said saddle adapted to absorb shocks receivedby said harrow teeth.

2. The invention as in claim 1, wherein said yoke is provided with alatching cross pin and means for retaining said pin in said keeper issecured to said upper toggle link adjacent one end of said keeper.

3. The invention as in claim 1 wherein slide members are formed on theforward harrow teeth which when moved to a horizontal position permitstransportation of said harrow over the ground.

T. A. BARREN'I'INE.

REFERENCES orrED The following references are of record in the

